We use MarketPress for our online shop and have been experiencing some issues lately with customers not being able to confirm their payment (no error is provided, it just keeps refreshing the Confirm Order page with their cart and shipping/billing info).

Also, some orders that do go through are not displaying complete information when they're transmitted to our shop. For example, the first and/or last name doesn't show up, no shipping/billing info shows up on the order, etc.

What is causing these issues, and how do I go about correcting them so we have correct orders and customers stop having to find alternate ways to place their orders??

I'll try disabling some things, namely Jetpack. I think we need WordPress HTTPS for our security though? It may be a little bit before I can confirm whether or not this has had any positive effect, as these problems seem to be occurring at random. Many orders go through just fine, and then we'll hit a snag again where someone's info doesn't show up or they can't finalize the order. I'll give this a shot though and report back.

We haven't had any other issues as of yet, so I'm not sure. They never seemed to be happening with any regularity before, so it's still kind of a waiting game. Hopefully it's resolved after I deactivated Jetpack!